Datadog has integrated with Prometheus, allowing users to send their metrics to Datadog using the OpenMetric exposition format. This integration enables users to analyze and visualize their Prometheus metrics alongside other data collected by Datadog, including application metrics and service checks. The integration is designed to be easy to use, requiring only a configuration file edit to start collecting metrics from a Prometheus backend. Once configured, users can build comprehensive graphs, dashboards, and alerts using the Prometheus data model, with labels automatically mapped to Datadog tags. Additionally, Datadog provides support for custom checks and Autodiscovery feature to monitor Kubernetes clusters and containerized services. The integration also notes that Prometheus metrics are subject to certain limits as custom metrics.